Increase neutron timeout in nova.conf

We are having timeouts in some calls from nova to
neutron api in CI environments. We are increasing
the value of this timeout to 60 seconds.

Change-Id: I5c7cb44717d5e8c2dda1ef53ef852c45cc10f99e

packstack/puppet/modules/packstack/manifests/nova/neutron.pp

@@ -10,6 +10,7 @@ class packstack::nova::neutron ()
       neutron_project_name => 'services',
       neutron_auth_url    => "${neutron_auth_url}/v3",
       neutron_region_name => hiera('CONFIG_KEYSTONE_REGION'),
+      neutron_url_timeout => '60',
     }
 
     class { '::nova::compute::neutron':